Hip Valley Roof Framing

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Hip valley roof framing.

Everything you need for standard roof framing situations. Rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect. The roof extension length must be at least twice as long as its width or the 2 hips will meet before they reach the existing building wall. For any roof slope expressed as x in 12 rise in run the hip and valley factor is determined by finding the square root of rise run 2.

The first step in the process of erecting the hip roof is to get the ridge beam into place at the top of the roof. This type of roof is also called broken back hip and valley roof because the main hips are intconeected by the rafter of gables on one side and the rafter of the valley on the other. Stick framing roofs also includes the eight mainstay charts found in a roof cutter s secrets including. Here roofs are constructed with an angle of 90 degrees.

The total rise of hip and valley rafters is. Now draw the centerlines for all rectangles that are formed inside. A hip and valley roof may be part of an irregular structure. A jack rafter is a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both.

First of all you need to design the layout of building. Now outline the biggest rectangle inside the building layout. Thus there are hip jack rafters and valley jack rafters. Such buildings may have more than four hips in the roofs and they form valleys at the inside corners.

Place the 4 6 common rafters in their designated positions along the 2 longest walls and nail them firmly to the wall with a nail gun. Similarly hip and valley rafters provide the point of connection for roof rafters framed at angles. However since there is some load transfer with these members the code requires a nominal 2 thickness and bracing to a load bearing partition at the upper end or to be designed as a beam with proper supports. Hip rafter ratio length multiplier hrrlm 18 12 1 5 common rafter length multiplier crlm 13 4164 12 1 11803.

Divide the rafter length by 12 of run to calculate the roof ratio multiplier. Side and bevel cuts on the hip valley rafter tail with square hung fascia. The hip and valley factor varies according to the slope of the roof as shown in the table below. Hip and valley roof framing is no so complex as compared to hip roof framing procedures.

Rr and ll ratios. Roof framing geometry kernel rafter lengths roof ratio multiplier. If the extension length is half the extension length the 2 hips will meet at the existing wall and the roof will come to a peak with no ridge like half a pyramid. Attach 4 6 centering rafters and lift the ridge beam into place.